Diagnostic and advisory skill for email deliverability problems. Use when a developer asks why emails are going to spam, not reaching the inbox, getting blocked, bouncing, or how to improve sender reputation — with or without a specified platform. Covers SendGrid-specific tooling: SPF, DKIM, DMARC, BIMI, IP warmup, list hygiene, bounce/spam rate thresholds, and Engagement Quality Score (SEQ).
Install
npx skills add twilio/ai --skill twilio-sendgrid-deliverability-advisornpx skills add twilio/ai --skill twilio-sendgrid-deliverability-advisor -a claude-code -gnpx skills add twilio/ai --skill twilio-sendgrid-deliverability-advisor -a codex -ggemini skills install https://github.com/twilio/ai.git --path skills/sendgrid/twilio-sendgrid-deliverability-advisorgh skill install twilio/ai twilio-sendgrid-deliverability-advisorgit clone --depth 1 https://github.com/twilio/ai /tmp/twilio__ai
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/twilio__ai/skills/sendgrid/twilio-sendgrid-deliverability-advisor ~/.claude/skills/twilio-sendgrid-deliverability-advisor # Claude Code
cp -R /tmp/twilio__ai/skills/sendgrid/twilio-sendgrid-deliverability-advisor ~/.agents/skills/twilio-sendgrid-deliverability-advisor # Codex, Cursor, Gemini CLI, Copilot, OpenCode